The museum collection includes archeological objects (with associated field records) recovered from park grounds relating to the battle of Concord on April 19, 1775, which set off the American Revolutionary War. Also included are memorabilia related to American sculptor Daniel Chester French's Minute Man Statue.
The park was expanded to include the Wayside, the home of Louisa May Alcott, Nathaniel Hawthorne and Margaret Sidney (pen name of Harriett Lothrop). The house remains the quintessential representation of nineteenth century Concord literary life. The historic collection consists of furnishings, decorative arts and textiles associated with The Wayside. These reflect Harriett Lothrop's interpretation of the house's history and her own place among its literary inhabitants. Other portions of the collections deal specifically with Lothrop's successful literary career as a children's author. Among the highlights are original illustrations for Lothrop's Five Little Peppers volumes. The park also contains a large archeological collection with materials ranging from the eighteenth to the twentieth century.
The collections may be summarized as follows: The Harriett Lothrop Papers
The Wayside Furnishings
The French Papers
Book Illustration Collection
Minute Man Statue Memorabilia Collection